MAXIM INTEGRATED PRODUCTS DS18B20 Programmable Resolution 1-Wire Digital Thermometer handbook
Datasheet
The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C (–67°F to +257°F).